MX-5500N, MX-6200N, MX-7000N (serv.man47). Self diagnostics Trouble Codes - Sharp Copying Equipment Service Manual (repair manual). Page 23

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MX-7000N  SELF DIAG AND TROUBLE CODE  8 – 23
 
F3-12
Tray 1 lift-up trouble
 
F3-22
Tray 2 lift-up trouble
 
F3-32
Tray 3 lift-up trouble
 
F3-42
Tray 4 lift-up trouble
 
F9-00
Communication trouble between the
controller and the printer controller
(FIERY option)
 
H2-00
Detection thermistor open (TH1_AD2)
of the non-contact thermistor
 
H2-01
Lower thermistor open (TH_LM)
 
H2-02
Sub thermistor open (TH_US)
 
H2-03
Non-contact thermistor 
compensation thermistor open 
(TH1_AD1)
Trouble content
T1LUD does not turn ON within the specified time.
Section
PCU
Case 1
Cause
T1LUD sensor trouble. Harness connection trouble 
between PCU PWB, the lift-up unit, and the paper 
feed unit.
Check and 
remedy
Check the harness and the connector of T1LUD.
Case 2
Cause
Tray 1 lift-up motor trouble
Check and 
remedy
Check the lift-up unit.
Trouble content
T2LUD does not turn ON within the specified time.
Section
PCU
Case 1
Cause
T2LUD sensor trouble. Harness connection trouble 
between PCU PWB, the lift-up unit, and the paper 
feed unit.
Check and 
remedy
Check the harness and the connector of T2LUD.
Case 2
Cause
Tray 2 lift-up motor trouble
Check and 
remedy
Check the lift-up unit.
Trouble content
LUD3 does not turn ON within the specified time.
Section
PCU
Case 1
Cause
LUD3 sensor trouble. Harness connection trouble 
between PCU PWB, the lift-up unit, and the paper 
feed unit.
Check and 
remedy
Check the harness and the connector of LUD3.
Case 2
Cause
Tray 3 lift-up motor trouble
Check and 
remedy
Check the lift-up unit.
Trouble content
LUD4 does not turn ON within the specified time.
Section
PCU
Case 1
Cause
LUD4 sensor trouble. Harness connection trouble 
between PCU PWB, the lift-up unit, and the paper 
feed unit.
Check and 
remedy
Check the harness and the connector of LUD4.
Case 2
Cause
Tray 4 lift-up motor trouble
Check and 
remedy
Check the lift-up unit.
Trouble content
A communication error is detected during initial 
establishment or after establishment of 
communication with the controller (FIERY option).
Section
MFP
Case 1
Cause
Printer controller MFPcnt PWB cable trouble
Check and 
remedy
Check the printer controller MFPcnt PWB cable.
Case 2
Cause
MFPcnt PWB trouble, printer controller PWB 
trouble
Check and 
remedy
Replace the MFPcnt PWB. Repair or replace the 
printer controller PWB.
After completion of check, turn OFF/ON the 
machine and the printer controller.
Trouble content
Thermistor open
Section
PCU
Case 1
Cause
Thermistor trouble, control PWB trouble, fusing 
section connector connection trouble, AC power 
source trouble, fusing unit not-installed
Check and 
remedy
Check the harness and the connector from the 
thermistor to the control PWB.
Trouble content
Thermistor open
Section
PCU
Case 1
Cause
Thermistor trouble, control PWB trouble, fusing 
section connector connection trouble, AC power 
source trouble, fusing unit not-installed
Check and 
remedy
Check the harness and the connector from the 
thermistor to the control PWB.
Trouble content
Thermistor open
Section
PCU
Case 1
Cause
Thermistor trouble, control PWB trouble, fusing 
section connector connection trouble, AC power 
source trouble, fusing unit not-installed
Check and 
remedy
Check the harness and the connector from the 
thermistor to the control PWB.
Trouble content
Thermistor open
Section
PCU
Case 1
Cause
Thermistor trouble, control PWB trouble, fusing 
section connector connection trouble, AC power 
source trouble
Check and 
remedy
Check the harness and the connector from the 
thermistor to the control PWB.
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